Underwater light



FIG. 1 is a front, left and bottom perspective view of an underwater light showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawing depict portions of the underwater light that form no part of the claimed design. 

CLAIM The ornamental design for an underwater light, as shown and described. 